<?php
/**
 * Smarty plugin
 * @package Smarty
 * @subpackage plugins
 */
/**
 * Smarty {mailto} function plugin
 *
 * Type:     function<br>
 * Name:     mailto<br>
 * Date:     May 21, 2002
 * Purpose:  automate mailto address link creation, and optionally
 * encode them.<br>
 * Input:<br>
 * - address = e-mail address
 * - text = (optional) text to display, default is address
 * - encode = (optional) can be one of:
 * * none : no encoding (default)
 * * javascript : encode with javascript
 * * javascript_charcode : encode with javascript charcode
 * * hex : encode with hexidecimal (no javascript)
 * - cc = (optional) address(es) to carbon copy
 * - bcc = (optional) address(es) to blind carbon copy
 * - subject = (optional) e-mail subject
 * - newsgroups = (optional) newsgroup(s) to post to
 * - followupto = (optional) address(es) to follow up to
 * - extra = (optional) extra tags for the href link
 *
 * Examples:
 * <pre>
 * {mailto address="me@domain.com"}
 * {mailto address="me@domain.com" encode="javascript"}
 * {mailto address="me@domain.com" encode="hex"}
 * {mailto address="me@domain.com" subject="Hello to you!"}
 * {mailto address="me@domain.com" cc="you@domain.com,they@domain.com"}
 * {mailto address="me@domain.com" extra='class="mailto"'}
 * </pre>
 * @link http://smarty.php.net/manual/en/language.function.mailto.php {mailto}
 * (Smarty online manual)
 * @version  1.2
 * @author   Monte Ohrt <monte at ohrt dot com>
 * @author   credits to Jason Sweat (added cc, bcc and subject functionality)
 * @param    array
 * @param    Smarty
 * @return   string
 */
function smarty_function_mailto ($params, &$smarty)
{
    $extra = '';
    if (empty($params['address'])) {
        $smarty->trigger_error("mailto: missing 'address' parameter");
        return;
    } else {
        $address = $params['address'];
    }
    $text = $address;
    // netscape and mozilla do not decode %40 (@) in BCC field (bug?)
    // so, don't encode it.
    $search = array('%40', '%2C');
    $replace = array('@', ',');
    $mail_parms = array();
    foreach ($params as $var => $value) {
        switch ($var) {
            case 'cc':
            case 'bcc':
            case 'followupto':
                if (! empty($value))
                    $mail_parms[] = $var . '=' .
                     str_replace($search, $replace, rawurlencode($value));
                break;
            case 'subject':
            case 'newsgroups':
                $mail_parms[] = $var . '=' . rawurlencode($value);
                break;
            case 'extra':
            case 'text':
                $$var = $value;
            default:
        }
    }
    $mail_parm_vals = '';
    for ($i = 0; $i < count($mail_parms); $i ++) {
        $mail_parm_vals .= (0 == $i) ? '?' : '&';
        $mail_parm_vals .= $mail_parms[$i];
    }
    $address .= $mail_parm_vals;
    $encode = (empty($params['encode'])) ? 'none' : $params['encode'];
    if (! in_array($encode, 
    array('javascript', 'javascript_charcode', 'hex', 'none'))) {
        $smarty->trigger_error(
        "mailto: 'encode' parameter must be none, javascript or hex");
        return;
    }
    if ($encode == 'javascript') {
        $string = 'document.write(\'<a href="mailto:' . $address . '" ' . $extra .
         '>' . $text . '</a>\');';
        $js_encode = '';
        for ($x = 0; $x < strlen($string); $x ++) {
            $js_encode .= '%' . bin2hex($string[$x]);
        }
        return '<script type="text/javascript">eval(unescape(\'' . $js_encode .
         '\'))</script>';
    } elseif ($encode == 'javascript_charcode') {
        $string = '<a href="mailto:' . $address . '" ' . $extra . '>' . $text .
         '</a>';
        for ($x = 0, $y = strlen($string); $x < $y; $x ++) {
            $ord[] = ord($string[$x]);
        }
        $_ret = "<script type=\"text/javascript\" language=\"javascript\">\n";
        $_ret .= "<!--\n";
        $_ret .= "{document.write(String.fromCharCode(";
        $_ret .= implode(',', $ord);
        $_ret .= "))";
        $_ret .= "}\n";
        $_ret .= "//-->\n";
        $_ret .= "</script>\n";
        return $_ret;
    } elseif ($encode == 'hex') {
        preg_match('!^(.*)(\?.*)$!', $address, $match);
        if (! empty($match[2])) {
            $smarty->trigger_error(
            "mailto: hex encoding does not work with extra attributes. Try javascript.");
            return;
        }
        $address_encode = '';
        for ($x = 0; $x < strlen($address); $x ++) {
            if (preg_match('!\w!', $address[$x])) {
                $address_encode .= '%' . bin2hex($address[$x]);
            } else {
                $address_encode .= $address[$x];
            }
        }
        $text_encode = '';
        for ($x = 0; $x < strlen($text); $x ++) {
            $text_encode .= '&#x' . bin2hex($text[$x]) . ';';
        }
        $mailto = "&#109;&#97;&#105;&#108;&#116;&#111;&#58;";
        return '<a href="' . $mailto . $address_encode . '" ' . $extra . '>' .
         $text_encode . '</a>';
    } else {
        // no encoding
        return '<a href="mailto:' . $address . '" ' . $extra . '>' .
         $text . '</a>';
    }
}
/* vim: set expandtab: */
?>
